Hello,
I have had a few dogs throughout the years that this has happened to. They getting a fight and avulse (pull the tooth out of the socket) the tooth in the process. For these cases I always do a dental and remove the tooth (it will not heal) and then close the gums after removing the broken bone around the tooth root. Your dog is essentially going to lose that tooth but with the dental surgery you can close the area so that they don’t have pain or get infections. Please see your vet asap and talk to them about this. Until then I would feed soft food and avoid playing with toys.
Licking the spot usually means it’s irritating in some way. I’d absolutely get him to the vet.
Hello,
It is not possible to diagnose any lesion based on a picture. A diagnosis of a mass is only made after a tissue sample is analyzed by a pathologist. I would see your vet and ask them to give their best guess as to what it is and I would also ask them about the possibility of it being a histiocytoma. Even this is only diagnosed after a biopsy. Let us know what they say.
His appointment is next Wednesday, my heart is breaking in the meantime